This puzzle:

Victor Fleming notes: I submitted this puzzle about 50 weeks before its publication date. In the transmittal letter I listed the twelve longest answers and their clues. In what was becoming, by then, something of a tradition, Will changed eleven of those twelve clues. The one that survived, though, was so clever on my part that I feel bound to repeat it here: [Some cats] SIAMESES. This was my first themeless crossword in the Times.